Stroke adjusting means



y 9, 1933. B. GRUMAN STROKE ADJUSTING MEANS Original Filed June 14, 1928 2 Sheets-Sheet l y 1933. B. GRUMAN 1,907,647

STROKE ADJUSTING MEANS Original Filed June 14, 1928 2 Sheets-Sheet 2 Patented May 9 I 1 STRQK'E'. AihWSTI-NG MEANSR:

Original application filed June 14,

1 7 1 "11932. Serial epplieejtien eis-"117i di-triioh e: pendingtalpplication- SeviabNo 285,273, filed Juneau,1928.301v Pumps (Patent Ne. 1 85x 87,-

-cliei ie of the liqtlidi i? ';::Th'e 'object ,of the present i ve tien is to provide simple hand fiici'ent mechanism whereby therstnoke'; of a reciprocating ele ment Or 7 elements, as, for example, the: piston orpistonsofla pu'mp,:;can be readily adjusted 'atzwill from zero *to maximum; and this :When

such elementui either active-onidle, thereby not ohlyl eflordihg provision for a *Wideinnge of pressil'res giav'nd cape-cities, abut also en abling thee/easy; lprogressiv'e Lste-rting ofizthe pump orioth'er apprat usltowhicha the-.inecharrism isgappliedu w 1; v The invention ac'omp'riees ;features. of; {novelty which, in" afipreferred I embodiment-inf th'ednvelitidn, will be'hei inafter described: the scope o f'the invention then ih the apl ended ela ims.

I :Figure 1' is a yertieal-section of stroke-ad.-

ustin gmechanism embodying the. ppinciple of *my invention; f 'slieh mechanism being 'shown as applied= :t0 the pistons of a. um Figs12 is a' horizontal-section; fas on the line -1 I *1 1- I" Fig. 3- is :a' transi'er se vertical section I as on the line 33 of Figgi'lxi in? w e --'Fig; 4-is a pert/i stroke-adjusting mechaniemlwv i The invention -is hereinffilhletratedie embodied in a ump of the dliplextypewherealignment and 'are' adebted ite operate 1 in alw "The oberating' shaft 10: is i maimed 'ihtefimediate the'pistene'hn a large diameter Teller bearing 625M, the respective sidesmf'a suitable easihg 111, which ncasing at th-is 100a"- ti'oriis 'censtruetedt proizide a-n oil feservoir 64. "Said hearings includewi'aeee IJOHDtQd in the'walls of the 'caingI'a-ndhdd.ihwplace bv suitable end coverlplates and-peckingeans,

the bearings are assembled, is heldinplaee bv a-zsetcollar 66; Inthe present irista'nce the Zlshaft is provided? with; a lafge. fly swheel I .vbiedfwiegaman e;

" bre er b to ev eheftffextehdsthro iighffa, ylbk'e'n gr re ts? ta s e' P P p tfl s' rqr g ly sefsemi T .ve q osshee mpr es ant -pe rec n ular r t eih h dine m i m a l 8 hd" eniie i gtsid harefi 1 slidably mounted firindependent w the wedge is p vi edeh iqsepp mnai with a" perforated 11 1gf72f in' ,whlch is mounted a t c @Qp ng feth berm is E .fiel ii' y lerge drivingeceentfie .7 i thiieh in itsfrete ti n impa s Qmp u e t q zati h 'r 'f thereby effeeting relative ve rtic'g il inOQve he'nt -.h0r iz0ntal ,reciprojcatie' pf; the a cross {The-driving eccentric 141's pro :31 sqim zse t 1' 6 1 f h J-d v g h f therebyaifonding'capacityferlimit meme-ofu hee c i r tra verse y A O th gated; cavity-:77 extehdingzatinight angles to he leng ot wh c vityseqnteins f e11;k dj t ngt en r c 73Whi f et m I tate on thedjrive Shaift-d i o m th ein an in er al e fl v. mesh e with: at 2% 8 also; r e-t0: r at 0.

gear, :is f-aet eona stud shaft; 82 v naled in-the ed-iaeentzeesing ;W31 1 3,nldyiS 7o,- vided atone side of the eatsihgwithehahdle 1Y1? iii erpds ed gbetweenl One tof the r 1; jugti g the yyedge theweeflhetyveeli thefslidr Y i fl ifl s 'm yt tak n-up Tdthi end,

his ls has, f t

that 1- ter line of the driving eccentric from the cens terline of the driving shaft at any desired gear may be swung through a predetermined arc, thus effecting the partial rotation of the gear and perforce moving the internalgear and correspondingly adjusting the eccentric 78. The handle is provided with a sector extensioni 84 having therein an arcuate slot 85 through which extends from the adjacent roller bearing cover (850) onvthe casing a screw 86 havinga. suitable clampmg handle 87 by the manipulation ofwhichthe adjusting handle may be locked in: any pre determined position of adjustment. 7 1 4 The adjusting eccentric 78 ofisets: the cenldista'z 'nce-up. to the maximum stroke, [ofthe adjusting eccentric, and the sliding connecti onfbetween thedrive shaftand the driving eccentric allows the latter toslide on the shaft-to the maximum extent. The adj usting eccentric, although free to rotate on the drive i zero the centralflineofthe driving eccentric coincides the center lineofthe; ing shaft and rotates'thereith: as aunit, while the cross-head and, perforce, the pump pistons remain idle, th isysaving the wear and tear ont'he pumpparts.

i the constrnct on" ust described "it will be "seenthat by, properly manipulating the nameless to adj ust' the eccentric78j in rela- "ti on'; to the axis'of theopera-ting '10, the

. stroke of theyoke or cross-head canbevaried from zerotomaximum, While the pump is idle or'ininotion, and that the eccentric can then of 'adj ustinent; r v 1i "Theoil level in the reservoi r'64' is such that the driving eccentric 74 infits' rotation" dips into the .oil and car'riesit to the associated movinggpart's'. {The pump casing has drain pockets 88'andfdrain'ports 89' to carry off be effectually locked in the desired position.

- any leakage of liquid past the packingfrings of the pistons, so that th'e'liquidflwill' notescla pesto the oil reservoir. The casing also has; a-"snitably-disposed removable cover- 90 to facilitate inspection of the oil reservoir, and the drivingandtransmitting mechanism;

\ QWhile I'ha've herein illustrated my inven- 'ti'on as embodied in a pump, it isto be understood that the; invention is of general utility and is not n'ec'ssarily'limited top'ump ap plication. It is al'so to be understood that mvinvention is not limited to: the form and details of construction herein disclosed as v t-he' mechanisrn may be variously modified 7 Within the principle of the'invention and the "scope of the appended claims; I I claim l llThe combination with a'rotaryope'rat in'g element, of a reciprocative element, an eccentric bearing slidably associated with said reciprocating element, a driving eccentric operatively mountedin said bearingand rotatable with yet movable transversely of said rotary operating element, an adjusting eccentric rotatably fitted in the said driving eccentric and loose on said rotary operating ele1nent,,and means for. adjusting said adj usting eccentric about 'the'axis of the rotary op- ;erating element and locking the latter eccentrio in predetermined positions of adjust m t- 2; The: combination with a rotary operat ing element, of a reciprocative element, an eccentric bearing 'sl'ida-bl y associated with said reci pro(':ativef element, a r driving eccen-' tric operatively: mounted in said} bearing: and rotatable with yet movable transverselyiof said rotaryoperating' element, "an: adjusting eccentric operatively fitted inthe driving eccentric-and loose on" said rotary operating element, saidiadjusting eccentrichaving an internal .gear,]a pinion loose on 'the ;rotary operating {element 7 and meshing: with} said internal-gear; an operating handle, a gear member thereon in .mesh with said pinion,

and means tor securing: saidzhand'leiin: prior determined positions ofadjustment; 3LrThe combination with a rotary'op ing element, of a horizontally reciprocative element, an: eccentric bearing associated with eratsaid reciprocative element andv having ca to; a driving eccentric: 1 operatively mounted in said bearing androtat'able'with yet-horii- "zontally slidable on saidarot'ary operating element, said eccentrichaving an elongated "opening therein, anxadjusting eccentric- 0p?- erati vely fitted in said-opening and loose on said rotary operatin-g'element', and means for pacity' for vertical movement relative there.-

adjusting said. adjusting eccentric about the axis otthe rotaryoperating element and look:- ingthe latter eccentric in predetermined positionsof adjustment;

' 4;Thew combination with a. casing lc'on structed to providea basal oil reservoir, a

shaft extending transversely of said' casing, bearings for said shaft, a horizontally-re iciprocative cross-head within said casing, an

m5 eccentric bearing slidable vertically in said cross-head, a driving eccentric" 'operatively mounted in said eccentric bearing and .rotata: ble with said shaft-yet slidable thereon-"in a horizontal path, saidkdrivingzeccentric being constructed and arranged to dip into the contents of the oil reservoir, an adjustingiec-r centric loose on said shaft and rotatably 'fitted in the said drivingeccentriqand means for adjustingisaid adjusting eccentric about the axis of said shaft and' locking thelatter eccentric in "predetermined positions of adjust ment..'

" 5. 111' a pump havingoppositely'extending pistons, and an operating shaft located-between said pistons, a head connecting said pistons, an eccentric bearing slidable'in said head, a driving eccentric operatively mounted in said eccentric bearing and rotatable," with, yet slidable on the said shaft, an adjusting eccentric loose on said shaft and rotatably fitted in the said driving eccentric, I and means for adjusting said adjusting ec centric about the axis of the shaft and lock- I ing the latter eccentric in predetermined positions of adjustment. y

Signed at New York in the county and State of New York this 16th 'day of June A. 1). 1932. r V LLOYD B. GRUMAN. 

